Peb txhua tus paub tias cov khoom tseem ceeb ntawm cov khoom siv tawv tawv yog micro loj carbide hmoov ntawm siab hardness thiab refractory hlau. Yog li ntawd, nws yog ib qho nyuaj heev, thiab muaj coob tus neeg nug yog hais tias lub hard alloy siv rau lub hard alloy pob hniav yog hlau? Yuav ua li cas nyuaj alloy tuaj txog? Hauv qab no, lub hard alloy str ...